Josh Jackson reportedly canceled his workout with the Celtics

Josh Jackson of the Kansas Jayhawks is defended by Dillon Brooks of the Oregon Ducks during the 2017 NCAA Men's Basketball Tournament Midwest Regional at Sprint Center on March 25, 2017 in Kansas City, Missouri. Ronald Martinez/Getty Images

Top NBA Draft prospect Josh Jackson canceled his Monday workout with the Boston Celtics, per ESPN sources.

Jackson is a 6-foot-8-inch small forward who averaged 16.3 points and 7.4 rebounds per game for Kansas last season. After the Celtics at No. 1,  the Lakers, Philadelphia 76ers, Phoenix Suns hold the next three picks in next week’s draft.